Update browser launch regex to support non-default logging frameworks (…

…#3842)

The original regex only works with the default logging system. If you change the output template with something like serilog or another logging framework the regex will not match. Loosening it up to match this text will work in more cases.

debugger-launchjson.md

@@ -45,7 +45,7 @@ The default launch.json template (as of C# extension v1.20.0) for ASP.NET Core p
 ```json
     "serverReadyAction": {
         "action": "openExternally",
-        "pattern": "^\\s*Now listening on:\\s+(https?://\\S+)"
+        "pattern": "\\bNow listening on:\\s+(https?://\\S+)"
     }
 ```
 
@@ -66,8 +66,7 @@ Notes about this:
 5. The way this works is that VS Code will scrape the output which is set to the console. If a line 
     matches the pattern, it will launch a browser against the URL which was 'captured' by the pattern.
     Here is an explanation of what the pattern does:
-    * `^`: This indicates that the pattern should only be matched against the beginning of a line.
-    * `\\s*` : Matches zero or more whitespace characters. Note that `\s` indicates a whitespace character, but because this is in a json string, the `\` needs to be escaped, hence `\\s`.
+    * `\\b` : Matches on a word boundery. Note that `\b` indicates a word boundary, but because this is in a json string, the `\` needs to be escaped, hence `\\b`.
     * `Now listening on:` : This is a string literal, meaning that the next text must be `Now listening on:`.
     * `\\s+` : Matches one or more space characters.
     * `(` : This is the beginning of a 'capture group' -- this indicates which region of text will be saved and used to launch the browser.
@@ -87,7 +86,7 @@ If you want to ignore the URL from the console output, you can remove the
 ```json
     "serverReadyAction": {
         "action": "openExternally",
-        "pattern": "^\\s*Now listening on:\\s+https?://\\S",
+        "pattern": "\\bNow listening on:\\s+https?://\\S",
         "uriFormat": "http://localhost:1234"
     }
 ```
@@ -97,7 +96,7 @@ If you want to use the port number from the console output, but not the host nam
 ```json
     "serverReadyAction": {
         "action": "openExternally",
-        "pattern": "^\\s*Now listening on:\\s+http://\\S+:([0-9]+)",
+        "pattern": "\\bNow listening on:\\s+http://\\S+:([0-9]+)",
         "uriFormat": "http://localhost:%s"
     }
 ```

package.json

@@ -2013,7 +2013,7 @@
               "stopAtEntry": false,
               "serverReadyAction": {
                 "action": "openExternally",
-                "pattern": "^\"^\\\\\\\\s*Now listening on:\\\\\\\\s+(https?://\\\\\\\\S+)\""
+                "pattern": "\\\\bNow listening on:\\\\s+(https?://\\\\S+)"
               },
               "env": {
                 "ASPNETCORE_ENVIRONMENT": "Development"

src/assets.ts

@@ -300,7 +300,7 @@ export function createWebLaunchConfiguration(programPath: string, workingDirecto
     // Enable launching a web browser when ASP.NET Core starts. For more information: https://aka.ms/VSCode-CS-LaunchJson-WebBrowser
     "serverReadyAction": {
         "action": "openExternally",
-        "pattern": "^\\\\s*Now listening on:\\\\s+(https?://\\\\S+)"
+        "pattern": "\\\\bNow listening on:\\\\s+(https?://\\\\S+)"
     },
     "env": {
         "ASPNETCORE_ENVIRONMENT": "Development"